Carbureter.



l. P. L. JAUGEY. GARBURETER.

APPLICATION FILED DEC. 6, 1910.

Patented Nov. 1 1, 1913 Figli ATTORNEYS AT PATENT OFFICE.

CARBURETER.

envases.,

Specification of Letters Patent.

Patented Nov. f1, 1913.

Application led December 6,1910. Serial No. 595,953.

lowing is a specification.

The object of thepresent invention 1s to provide a carbureter in which the usual fleet Avalve feed is dispensed with and the speed of the motor regulated by controlling the supply of carbureting liquid to the carbureter.

ln certain types of' motors, particularly those used in aeroplanes, it is highly disadvantageous to use a carbureter in' which the supply of carbureting liquid (hereafter referred to as petrol, for the sake of brevity) is controlled by a float valve, inasmuch as the float chamber is constantly being tilted to different angles. No constant level in the float chamber (which is the object ofl the floatvalve arrangement) can be maintained under these conditions and irregularities 'in the feed to the carbureter result with theconsequence that the engine is unevenly fed and may even'stop, with disastrous results to the aviator.

ln the present carbureter, the float valve feed is replaced by a needle valve or the like which controls the admission of petrol to the atomizing device Without obstructing the atomizing orifices. The present arrangement is such'that when it is des-ired to accelerate the motor, the supply of petrol is momentarily diminished automatically by the very yact which results the following mo-v ment in restablishing the usual feed of petrol slightly in excess of the theoretically perfect amount, in order to render certain the operation of the motor. The temporary diminution of the petrol supply results in the establishment of a theoretically perfect feed for the moment, with the result that the motor is instantly accelerated While the subse-l lquent increased feed of petrol is accompanied by a suitably augmented supply of air to maintain the motor at its accelerated speed.

An exemplary embodiment of my invention is shown in the accompanying. drawings in which,

Figure l is a longitudinal vertical section showing the position of the parts at the moment the speed of the motor is accelerated;

2 is a section on the line 2-2, Fig. 1; Figs. 3 and 4 are vertical sections through the admission port of the petrol, showing the latter respectively closed and open for the slowest speed for the motor; Figs. 5 and 6 are respectively side and end views of the air valve i In the embodiment of my invention here shown, my improved carbureter comprises anoil spraying cylindena in which Works a piston valve b with packing rings' b1. Atomizing orifices c in the upper Wallof the here horizontally placed cylinder, establish communication between the interior of the cylinder and the outlet or suction pipe d leading to 4the motor. The end of the piston b is coned to form, a needle valve e, the coned seat el for which is formed in the end of the cylinder which communicates with the petrol supply 'pipe j'. The latter is connected with any suitable storage tank (not shown) and is provided with a cock f1 by 4mean-s of which the supply of petrol to the carbureter, may be admitted or cut ptt.

Beneath the atomizing cylinder 'a is arranged anair box g in one end of which a series of apertures t are formed for the admission of air. 'These apertures may be of different sizes as shown and in any event are controlled by a multi-plunger valve connected by a stirrup 7' with the rod of the piston b. The plunger rods a of this valve correspond in diameter to their respective apertures L and are of different lengths, each having its end formed onthe bias and its end face grooved as at t1 so that each aperture t is closed or opened gradually as the plunger is moved-in or out. A second air inlet to the chamber g is closed bythe valve 7c pressed to its seat by the spring k1. A hub Z may also be provided on the air box to receive a connection from the exhaust pipe so that, if needed, the exhaust gases may be led to the carbureter to raise the temperature ofthe explosive mixture.

The outlet through the pipe d to the motor is controlled by a sleeve m concentric with. the cylinder a "and Working in the socket mi. This sleeve m is connected to the stirrup j and thus moves with the valve b v and air valve z', so that the outlet to the suction pipe al is opened or closed in harmony Withthe augmentation or decrease in the supply of explosive mixture. A notch n in the forward edge of the sleeve m affordsV E ne? a sufficient aperture for the admission ci the mixture to the pipe Z when the engine is running at its loWest speed.

The operation of the carbureter is readily understood. In the position shown Fig. 3 the motor is stopped, the sleeve' mcom` pletely closes the pipe d, the needle-valve e is seated so that the supply of petrol is cut oli" and the air supply openings 'it are closed by the plungers 27. ln the position shown in Fig. 4, when the motor is Working at its lowest speed, only a single atomizer critice c in the cylinder a is uncovered by the piston b, the needle valve e is slightly opened, the shortest rod partially opens one of the air portsv /L and the explosive mixture escapes to the pipe Z through the notch n in the sleeve m.

In view of the distance between the oriices 'c in the cylinder m it is possible to increase the amount of air admitted at 7L Without increasing the supply of petrol, and vice versa, by moving the stirrup slightly in one direction or the other, for example, by a hand lever not shown. This movement augmente or reduces the amount of petrol admittedto the cylinder m by the valve e, Without throttling the spray aperture c. a

I claim as my invent-ion- 1. In a carbureter, an oil feed Cylinder With lateral spray outlets in combination with a piston valve Working in said feed cylinder and serving upon the sudden. opening of the outlets to create a temporary depression in said feed cylinder whereby the escape of oil therefrom is temporarily diminished, together With a needle valve moving `With said piston and controlling the admission of petrol to the feed cylinder, for the purpose described.

2. In a carbureter, an oil feed cylinder with lateral spray out-iets in combination with a piston valve working in said feed cylinder and serving upon the sudden opening of the outlets `to create a temporary depression in said feed. cylinder whereby 'f tures, a piston valve cont-rolling the latter,

an inlet aperture opening to the feed cylinder, and a. needle valve moving with the piston to control the admission of oilY through said aperture to the cylinder, in combination with an au' inlet and a valve moving with said piston to control the air supply, the spray apertures in said. feed cylinder being spaced apart sufficient distance to permit the flow of petrol to the feed cylinder and the admission of air to the carbureter to be increased or diminished Without opening additional spray apertures or throttling those open While running at low speed, substantially as described.

In testimony whereof l have' signed my name to this specification, in the presence of two subscribing Witnesses.

PAUL PIERRE LOUIS JAUGEY.

Witnesses:

JACQUES LTJEUNE, LON PEILLET. 

